Accurate temperature readings - Measurement span: -9.9 to 50 degrees Celsius with 5-second updates - Uses a high-accuracy sensor chip to maintain precise water temperature control in your aquarium Rechargeable convenience - USB-C charging with a built-in 5V battery - Up to 45 days of use per charge - Keeps continuous water temperature tracking without frequent recharging interruptions Smart energy saver - Automatically powers off within 30 seconds - Quick single-touch thermal readings - Supports wireless usage and delivers a sleek cordless appearance Improved night visibility - Night view backlight and a clear LED display - Large 2-inch digital screen for easy reading in any light Use scenarios - Freshwater or saltwater aquariums: reliable monitoring to maintain stable water temperature for fish and corals - Nano or desktop tanks: cordless operation and long battery life minimize clutter near the tank - Quarantine tanks or portable setups: accurate, low-maintenance temperature checks with easy readability in low light